BENGHAZI, Libya, April 26 (Reuters) - Veteran military commander Khalifa Haftar, the most powerful figure in eastern Libya, returned to Benghazi on Thursday after a two-week absence for medical treatment in Paris, local TV showed.

ANTANANARIVO (Reuters) - Madagascar's opposition called on Thursday for the president and prime minister to resign and said it would no longer negotiate in a deepening dispute over new election laws.

WASHINGTON (Reuters) - U.S. Defense Secretary Jim Mattis said on Thursday that a report into a deadly ambush in Niger last year that killed four U.S. soldiers has found that a number of issues led to the incident.

SOFIA, April 26 (Reuters) - The European Union plans to vastly expand its external border control force in a bid to further discourage migrants from moving to the continent, an EU source said, disclosing details of a proposal on future EU spending due next week.

ROME (Reuters) - Italian police have arrested an immigrant from Gambia suspected of planning an attack on behalf of the Islamic State (IS) militant group, a prosecutor said on Thursday.

ROME, April 26 (Reuters) - Italian police have arrested an immigrant from Gambia suspected of planning an attack on behalf of the Islamic State (IS) militant group, a prosecutor said on Thursday.

RABAT (Reuters) - Moroccan schoolgirl Meriem was just 16 when her family pressured her to marry a man she had never met 20 years her senior. Young brides are best, the family said and she looked forward to dressing up for the wedding.

JOHANNESBURG (Reuters) - South African businessman Christo Wiese has launched a $5 billion lawsuit against crisis-hit Steinhoff, a retail company in which he was a board member and biggest shareholder until earlier this year, his company Titan Group said.

LONDON (Reuters) - The IAAF confirmed a new hyperandrogenism rule on Thursday that could prevent South African runner Caster Semenya from competing in 800m and 1500m races.